Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c3d7c4e9fde2a4…

MALICIOUS

PDF

39.2 KB Created: 2020-08-25 03:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48852249596e69fc0d2936a7331ecb53 SHA-1: 4408899b51e57e3854995ea2fa4898f7428830da SHA-256: 89c3d7c4e9fde2a4a97f39e6b111a04518bfc5ee5c1aee6b6b7465c6a9317897
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector link. The document body and heuristics suggest a lure related to 'bully anniversary apk data', pointing to a phishing or malware distribution attempt. The primary malicious IOC is the redirector URL, which likely leads to further stages of infection.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=bully+anniversary+apk+data
    • http://files.js-militaria.com/uploads/1/3/1/6/131637190/jebovosegovuxaso.pdf
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/duxobivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/21250124174.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/genting_singapore_sustainability_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/cryptic_quiz_answers_4-_n.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/88155740779.pdf
    • https://cdn.shopify.com/s/files/1/0437/0736/7592/files/tepowesitafipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/97868216226.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/accountancy_class_12_important_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/linguistic_typology_morphology_and_syntax.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/sotamagikixosid.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ae2.bin
a63a995aab80734fdf2eebff6f3cf121791094642daf2c9ae75b5f833ad05a38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE2 5228 bytes
font_01_sfnt_off00006cc6.bin
8b699b101fcd621db1dd784f7afd0b1d7900a37a4fd8fc43f3f0732fba09a3c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC6 10420 bytes

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